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#include <fcntl.h>
#include <unistd.h>
#include <utmp.h>
#include <_syslist.h>
#include <_ansi.h>
static int utmp_fd = -2;
static char *utmp_file = UTMP_FILE;
static struct utmp utmp_data;
void
setutent ()
{
if (utmp_fd == -2)
{
utmp_fd = _open (utmp_file, O_RDONLY);
}
_lseek (utmp_fd, 0, SEEK_SET);
}
void
endutent ()
{
_close (utmp_fd);
utmp_fd = -2;
}
void
utmpname (_CONST char *file)
{
extern char *strdup (char *);
utmp_file = strdup (file);
}
struct utmp *
getutent ()
{
if (utmp_fd == -2)
setutent ();
if (_read (utmp_fd, &utmp_data, sizeof (utmp_data)) < sizeof (utmp_data))
return 0;
return &utmp_data;
}
struct utmp *
getutid (struct utmp *id)
{
while (_read (utmp_fd, &utmp_data, sizeof (utmp_data)) == sizeof (utmp_data))
{
switch (id->ut_type)
{
case RUN_LVL:
case BOOT_TIME:
case OLD_TIME:
case NEW_TIME:
if (id->ut_type == utmp_data.ut_type)
return &utmp_data;
case INIT_PROCESS:
case LOGIN_PROCESS:
case USER_PROCESS:
case DEAD_PROCESS:
if (id->ut_id == utmp_data.ut_id)
return &utmp_data;
default:
abort ();
}
}
return 0;
}
struct utmp *
getutline (struct utmp *line)
{
while (_read (utmp_fd, &utmp_data, sizeof (utmp_data)) == sizeof (utmp_data))
{
if ((utmp_data.ut_type == LOGIN_PROCESS ||
utmp_data.ut_type == USER_PROCESS) &&
!strncmp (utmp_data.ut_line, line->ut_line,
sizeof (utmp_data.ut_line)))
return &utmp_data;
}
return 0;
}
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